Microbial experiment cooling and temperature-sensing multipurpose rack

ABSTRACT

A multi-function cooling and thermo-sensitive rack includes horizontal bars, a base, positioning holes, connectors, a lateral frame, connecting holes, a temperature-displaying prompter, and N temperature sensors. The lateral frame and the base are connected through the connectors. The lateral frame and the base have their surfaces facing each other symmetrically provided with plural connecting holes thereon. The horizontal bars have two ends thereof received in the corresponding symmetrical connecting holes. The positioning holes are distributed over the surface of the base. The N temperature sensors have output ends thereof for outputting sensing signals connected with input ends of the temperature-displaying prompter for inputting the N temperature-sensing signals. The present invention is applied to apparatuses used in microbiology experiment.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of PCT/CN2014/082652 filed 2014 Jul.21, which claims priority to CN 201320448092.0 filed 2013 Jul. 25, bothof which are incorporated herein by reference.

TECHNICAL FIELD

The present invention relates to apparatuses used in microbiologyexperiments.

DESCRIPTION OF RELATED ART

Currently, inoculation loops and applicators prepared for sterileexperiment on a clean bench are placed directly on the bench surface andare later sterilized by open flame from an alcohol burner before use.After such dry heat sterilization, the sterilized tools have to be heldin operators' hands until they become cool, and this causes greatinconvenience during the experiment. Particularly, for experiment wheredifferent bacteria have to be incubated or different plates have to beprepared, the loops and/or applicators need open-flame sterilizationafter each time of use, and this is quite time-consuming. Moreover, thetemperatures of the processed inoculation loops and/or applicators andof culture medium in Erlenmeyer flasks that has been sterilized aremeasured only relying on operators' experience. Once such empiricaldetermination is faulty, the result of the experiment can be adverselyaffected, in turn highly risking the efficiency of the experiment.

SUMMARY OF THE INVENTION

One objective of the present invention is to provide a multi-functioncooling and thermo-sensitive rack for microbiology experiment thateliminates the problems in the prior art that during experiment theoperators have to hold inoculation loops and/or applicators sterilizedby open flame from an alcohol burner in hands for cooling and that themerely empirically determined temperature of culture medium sterilizedby steam might be inaccurate and in turn adversely affects the accuracyof the experimental results.

The disclosed multi-function cooling and thermo-sensitive rack formicrobiology experiment comprises horizontal bars each having aplurality of semicircular positioning dents, a base, connectors, alateral frame, connecting holes, a temperature-displaying prompter, andN temperature sensors, where N is an integer greater than or equal toone, wherein the lateral frame is a U-shaped frame, the base haspositioning holes, the lateral frame and the base are dimensionallyidentical to each other, the lateral frame and the base are connectedthrough the connectors, the arms of the U-shaped frame of the lateralframe are provided symmetrically with plural connecting holes, whereinthe horizontal bars are horizontally fixed to and mounted over theconnecting holes, and wherein the N temperature sensors are arranged atN temperature-measured sites, respectively, and the N temperaturesensors have output ends for outputting temperature-sensing signalsconnected with the input ends of the temperature-displaying prompter forinputting N temperature-sensing signals.

The present invention features the heat resistant horizontal bars thatare arranged on the lateral frame having a plurality of positioningdents and the base having a plurality of positioning circular holes, andalso features the angular adjustability between the base and the lateralframe, so that inoculation loops and/or applicators can be placedbetween the positioning dents on the lateral frame and the positioningcircular holes of the base. The disclosed rack is structurally simpleand angularly adjustable and can be assembled according to its use. Withthe temperature sensors that measure temperatures in a real-time mannerand with the temperature-displaying control unit that displays themeasured temperatures, experiment can be significantly improved in termsof accuracy and efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structurally schematic drawing depicting a multi-functioncooling and thermo-sensitive rack for microbiology experiment accordingto Embodiment 1 of the present invention.

FIG. 2 is a structurally schematic drawing depicting atemperature-displaying prompter according to Embodiment 2 of the presentinvention.

FIG. 3 is a cross-sectional view of a reversible ratchet mechanism of aconnector 5 according to Embodiment 7 of the present invention.

FIG. 4 is a plan view of the reversible ratchet mechanism of a connector5 according to Embodiment 7 of the present invention.

FIG. 5 is a structurally schematic drawing depicting a multi-functioncooling and thermo-sensitive rack for microbiology experiment accordingto Embodiment 13 of the present invention.

FIG. 6 is a structurally schematic drawing depicting a multi-functioncooling and thermo-sensitive rack for microbiology experiment accordingto Embodiment 25 of the present invention.

FIG. 7 is a structurally schematic drawing depicting a temperatureprompter according to Embodiment 26 of the present invention.

FIG. 8 is a structurally schematic drawing depicting a multi-functioncooling and thermo-sensitive rack for microbiology experiment accordingto Embodiment 37 of the present invention.

DETAILED DESCRIPTION OF THE INVENTION Embodiment 1

Referring to FIG. 1, in the present embodiment, a multi-function coolingand thermo-sensitive rack for microbiology experiment compriseshorizontal bars 1 having a plurality of semicircular positioning dents,a base 3, connectors 5, a lateral frame 6, connecting holes 7, atemperature-displaying prompter 8, and N temperature sensors 9, where Nis an integer greater than or equal to one. The lateral frame 6 is aU-shaped frame. The base 3 has positioning holes 4. The lateral frame 6and the base 3 are dimensionally identical to each other. The lateralframe 6 and the base 3 are connected through the connectors 5. The armsof the U-shaped frame of the lateral frame 6 are provided symmetricallywith plural said connecting holes 7. The horizontal bars 1 arehorizontally mounted on the connecting holes 7. The N temperaturesensors 9 are located at N temperature-measured sites, respectively. TheN temperature sensors 9 have output ends for outputtingtemperature-sensing signals connected with input ends of thetemperature-displaying prompters 8 for inputting the Ntemperature-sensing signals.

Embodiment 2

Referring to FIG. 2, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 1. The temperature-displayingprompter 8 comprises a controller 8-1, a display 8-2, a power circuit8-3, and a buzzer 8-4. The power output ends of the power circuit 8-3connect with the power input end of the controller 8-1, the power inputend of the display 8-2, and the power input end of the buzzer 8-4,respectively. The input ends of the controller 8-1 for inputting the Ntemperature-sensing signals connect with the output ends of the Ntemperature sensors 9 for outputting the sensing signals. The output endof the controller 8-1 for outputting the displaying signal connects withthe input end of the display 8-2 for inputting the displaying signal.The output of the controller 8-1 for outputting the buzzer-activatingcontrol signal connects with the input end of the buzzer 8-4 forinputting the buzzer-activating control signal.

The present embodiment may be set that when any of the temperaturesensors detects a temperature that is suitable for inoculation andpouring solid medium, the buzzer (8-4) buzzes.

Embodiment 3

Referring to FIGS. 1 and 2, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 2. The controller 8-1 is asingle-chip microcontroller.

Embodiment 4

Referring to FIG. 1, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 1. The positioning dents are evenlydistributed over the horizontal bar 1.

Embodiment 5

Referring to FIG. 1, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 1. The lateral frame 6 is formed byheat resistant frame.

Embodiment 6

Referring to FIG. 1, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 1. The base 3 is formed by heatresistant base.

Embodiment 7

Referring to FIGS. 1, 3, and 4, the present embodiment further delimitsthe multi-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 1. The connector 5 comprises areversible ratchet mechanism.

The connectors 5 each has a through hole that has two coplanar circlecenters A, B. Up to twenty internal teeth 5-3 are formed on the wall ofthe through hole symmetrically against a point that is an intersectionpoint of an imaginary connecting line linking the circle centers (A, B)and one site R or r on the wall of the through hole. A ratchet 5-5 thathas an outer wall peripherally formed with a row of teeth is received inthe through hole. The ratchet 5-5 is configured to radially move to andfro toward either of the circle centers A and B. The teeth of theratchet 5-5 can engage with each of the internal teeth 5-3, so as toradially rotate in either direction as a whole or to rotateindependently of each other. A handle 5-2 extends radially outward fromouter periphery of the through hole. The middle line of handle 5-2 is acenter line 5-1. The center line 5-1 coincides with, is parallel to, orintersects the imaginary connecting line linking the circle centers Aand B. The ratchet 5-5 is provided with a nut-fitting hole, a squareinsert, or a mechanical workpiece 5-4. Each of the teeth of the ratchet5-5 has a curved top surface C and has a top width D equal to or greaterthan a root width E. Each of the internal teeth 5-3 has a curved or flattop surface F and has a top width T equal to or greater than a rootwidth L. The outer periphery of opposite ends of the ratchet 5-5 has tworetaining rings 5-6 for retaining the ratchet 5-5 in the through holeand two recesses for receiving two retaining rings 5-6. The retainingrings 5-6 are spring loops cut at a radius thereof.

In use, by radially pushing the handle 5-2 slightly and bringing theinternal teeth 5-3 near the handle 5-2 engaged with the teeth of theratchet 5-5, the rack can be radially rotated and thus expanded. On theother hand, by radially pulling the handle 5-2 slightly, the internalteeth 5-3 are disengaged from the teeth of the ratchet 5-5, so that thehandle 5-2 is allowed to be rotated reversely to collapse the rack.

The present invention features for the positioning circular holes formedon the base, and also features for the connection based on thereversible ratchet mechanism between the base and the lateral frame, andthe angular adjustability thereof, so that different needs ofexperiments can be met. The connector uses a reversible ratchetmechanism to control the open angle formed by the base and the lateralframe, while the lateral frame can be well positioned and supported. Thehorizontal bars having the positioning dents are heat resistant anddirectly mounted on the lateral frame. These horizontal bars can beselectively arranged at different sites on the lateral frame for meetingvarious needs. In use, an inoculation loop or applicator may have itslower end inserted in a positioning hole, and have its upper end leantagainst a positioning dent. Erlenmeyer flasks can be placed on the base.The sensors may be arranged at different sites on the rack for sensingthe temperatures of heated culture medium in Erlenmeyer flasks or flamedexperimental tools such as inoculation loops and applicators. When aheated Erlenmeyer flask containing the sterilized culture medium isplaced on the temperature sensor, the temperature-displaying promptercan display the temperature of the culture medium, and the buzzer buzzeswhen this temperature reaches a setting value required by the ongoingexperiment, thereby helping to prevent the culture medium from beingoverheated or overcooled which will affect results of the experiment.The temperatures of flamed inoculation loops and/or applicators sensedby the temperature sensors can be read out at the display of theprompter, thereby enabling immediate determination about whether it'stime to perform inoculation, so as to improve test accuracy andefficiency.

The advancement of the present invention includes: (1) reasonable designbecause the disclosed rack is structurally simple and angularlyadjustable and can be assembled according to its use; (2) extensive usebecause the disclosed rack can well support various tools such asinoculation loops and/or applicators that are sterilized by open flame,and the disclosed rack can sense temperatures of experiment devices suchas inoculation loops, applicators and Erlenmeyer flasks; and (3)value-added functions provided by the temperature sensors and thetemperature-displaying prompter, which help to reduce faults inexperiments, thereby improving test efficiency.

Embodiment 8

Referring to FIG. 1, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 1. The base 3 contains therein atemperature-lowering substance.

It is possible to change the material and thickness of the base 3according to the properties of the temperature-lowering substance andactual requirements for cooling.

Embodiment 9

Referring to FIG. 1, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 8. The temperature-lowering substancecan be removed from the base 3.

The present embodiment may use a reusable temperature-loweringsubstance.

Embodiment 10

Referring to FIG. 1, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 8 or 9. The temperature-loweringsubstance is a cooling pack.

Embodiment 11

Referring to FIG. 1, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 10. The cooling pack is a chemicalcooling pack or a physical cooling pack.

The chemical cooling pack may be a chemical ice pack that is made ofsodium sulfate decahydrate, ammonium hydrogen sulfate, sodium hydrogensulfate, and ammonium nitrate.

Embodiment 12

Referring to FIG. 1, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 11. The physical cooling pack is adry ice pack, a water ice pack, a water-salt ice pack, or awater-ethanol ice pack.

The physical cooling pack is reusable. The multi-function cooling andthermo-sensitive rack for microbiology experiment can be placed into arefrigerating appliance (e.g. a refrigerator or an icebox) as a whole.Alternatively, the physical cooling pack can be removed from the rackand placed into a refrigerating appliance alone.

Embodiment 13

Referring to FIG. 5, in the present embodiment, a multi-function coolingand thermo-sensitive rack for microbiology experiment compriseshorizontal bars 1 having a plurality of semicircular positioning dents,a base 3, connectors 5, and a lateral frame 6. The lateral frame 6 is aU-shaped frame. The base 3 has positioning holes 4. The lateral frame 6and the base 3 are dimensionally identical to each other, the lateralframe 6 and the base 3 are connected through the connectors 5. Thehorizontal bars 1 are horizontally mounted on the arms of the U-shapedframe of the lateral frame 6. The horizontal bars 1 and/or the base 3are thermochromic.

Embodiment 14

Referring to FIG. 5, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 13. The positioning dents are evenlydistributed over the horizontal bar 1.

Embodiment 15

Referring to FIG. 5, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 13. The lateral frame 6 is formed byheat resistant frame.

Embodiment 16

Referring to FIG. 5, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 13. The base 3 is formed by heatresistant base.

Embodiment 17

Referring to FIGS. 3, 4, and 5, the present embodiment further delimitsthe multi-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 13. The connector 5 comprises areversible ratchet mechanism.

Embodiment 18

Referring to FIG. 5, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 13. The base 3 contains therein atemperature-lowering substance.

It is possible to change the material and thickness of the base 3according to the properties of the temperature-lowering substance andactual requirements for cooling.

Embodiment 19

Referring to FIG. 5, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 18. The temperature-loweringsubstance can be removed from the base 3.

Embodiment 20

Referring to FIG. 5, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 18 or 19. The temperature-loweringsubstance is an ice pack.

Embodiment 21

Referring to FIG. 5, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 20. The ice pack is a chemical icepack or a physical ice pack.

Embodiment 22

Referring to FIG. 5, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 21. The physical ice pack is a dryice pack, a water ice pack, a water-salt ice pack, or a water-ethanolice pack.

The physical ice pack is reusable. The multi-function cooling andthermo-sensitive rack for microbiology experiment disclosed can beplaced into a refrigerating appliance (e.g. a refrigerator or an icebox)as a whole. Alternatively, the physical ice pack can be removed from therack and placed into a refrigerating appliance alone.

Embodiment 23

Referring to FIG. 5, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 13. The horizontal bars 1 and/or thebase 3 include a thermochromic material.

Embodiment 24

Referring to FIG. 5, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 23. The thermochromic material isthermochromic microencapsulated powder, thermochromic powder,thermochromic emulsion, thermochromic color master batch, orthermochromic ink.

The thermochromic material may be set that it changes its color when itis higher than a temperature that is suitable for inoculation andpouring solid medium, or that it changes its color when it is lower thanthe temperature that is suitable for inoculation and pouring solidmedium.

The thermochromic microencapsulated powder, thermochromic powder,thermochromic emulsion, thermochromic color master batch, orthermochromic ink is commercially available at chemistry companies.

The thermochromic microencapsulated powder, thermochromic powder,thermochromic emulsion, thermochromic color master batch orthermochromic ink is commercially available at Bianse Chemistry Co.,Ltd., Shenzhen City, China.

Embodiment 25

Referring to FIG. 6, in the present embodiment, a multi-function coolingand thermo-sensitive rack for microbiology experiment compriseshorizontal bars 1 having a plurality of semicircular positioning dents,a base 3, connectors 5, a lateral frame 6, a temperature prompter 18,and infrared temperature sensors 10. The lateral frame 6 is a U-shapedframe. The base 3 has positioning holes 4. The lateral frame 6 and thebase 3 are dimensionally identical to each other. The lateral frame 6and the base 3 are connected through the connectors 5. The horizontalbars 1 are horizontally mounted on the arms of the U-shaped frame of thelateral frame 6. The infrared temperature sensor 10 has an output endfor outputting a sensing signal connected with an input end of thetemperature prompter 18 for inputting the temperature-sensing signal.

There are N infrared temperature sensors 10, where N is an integergreater than or equal to one. Each of the infrared temperature sensors10 is dedicated to measure one experimental tool placed on themulti-function cooling and thermo-sensitive rack.

Embodiment 26

Referring to FIGS. 7 and 6, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 25. The temperature prompter 18comprises a controller 18-1 and a power circuit 18-3, and furthercomprises a display 18-2 and/or a buzzer 18-4. The power circuit 18-3has its power output end connected with the power input end of thecontroller 18-1, the power input end of the display 18-2, and the powerinput end of the buzzer 18-4, respectively. An input end of thecontroller 18-1 for inputting each of the temperature-sensing signals isconnected with an output end of one infrared temperature sensor 10 foroutputting the sensing signal. The output end of the controller 18-1 foroutputting the displaying signal is connected with the input end of thedisplay 18-2 for inputting the displaying signal. The output end of thecontroller 18-1 for outputting the buzzer-activating control signal isconnected with the input end of the buzzer 18-4 for inputting thebuzzer-activating control signal.

It may be set that when any of the infrared temperature sensors 10detects a temperature that is lower than the temperature suitable forinoculation and pouring solid medium, the buzzer 18-4 buzzes.

Embodiment 27

Referring to FIGS. 7 and 6, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 25. The controller 18-1 is asingle-chip microcontroller.

Embodiment 28

Referring to FIG. 6, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 25. The positioning dents are evenlydistributed over the horizontal bar 1.

Embodiment 29

Referring to FIG. 6, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 25. The lateral frame 6 is formed byheat resistant frame.

Embodiment 30

Referring to FIG. 6, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 25. The base 3 is formed by heatresistant base.

Embodiment 31

Referring to FIGS. 3, 4, and 6, the present embodiment further delimitsthe multi-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 25. The connector 5 comprises areversible ratchet mechanism.

Embodiment 32

Referring to FIG. 6, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 25. The base 3 contains therein atemperature-lowering substance.

It is possible to change the material and thickness of the base 3according to the properties of the temperature-lowering substance andactual requirements for cooling.

Embodiment 33

Referring to FIG. 6, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 32. The temperature-loweringsubstance can be removed from the base 3.

Embodiment 34

Referring to FIG. 6, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 32 or 33. The temperature-loweringsubstance is a cooling pack.

Embodiment 35

Referring to FIG. 6, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 34. The cooling pack is a chemicalcooling pack or a physical cooling pack.

Embodiment 36

Referring to FIG. 6, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 35. The physical cooling pack is adry ice pack, a water ice pack, a water-salt ice pack, or awater-ethanol ice pack.

The physical cooling pack is reusable. The multi-function cooling andthermo-sensitive rack for microbiology experiment can be placed into arefrigerating appliance (e.g. a refrigerator or an icebox) as a whole.Alternatively, the physical cooling pack can be removed from the rackand placed into a refrigerating appliance alone.

Embodiment 37

Referring to FIG. 7 and FIG. 8, in the present embodiment, amulti-function cooling and thermo-sensitive rack for microbiologyexperiment comprises horizontal bars 1 having a plurality ofsemicircular positioning dents, a base 3, connectors 5, a lateral frame6, temperature sensors 11 and a temperature prompter 18. The lateralframe 6 is a U-shaped frame. The base 3 has positioning holes 4. Thelateral frame 6 and the base 3 are dimensionally identical to eachother. The lateral frame 6 and the base 3 are connected through theconnectors 5. The horizontal bars 1 are horizontally mounted on the armsof the U-shaped frame of the lateral frame 6. The temperature sensor 11has an output end for outputting a sensing signal connected with aninput end of the temperature prompter 18 for inputting thetemperature-sensing signal. The temperature prompter 18 comprises acontroller 18-1 and a power circuit 18-3, and further comprises adisplay 18-2 and/or a buzzer 18-4. The power circuit 18-3 has its poweroutput end connected with the power input end of the controller 18-1,the power input end of the display 18-2, and the power input end of thebuzzer 18-4, respectively. An input end of the controller 18-1 forinputting each of the temperature-sensing signals is connected with anoutput end of one temperature sensor 11 for outputting the sensingsignal. The output end of the controller 18-1 for outputting thedisplaying signal is connected with the input end of the display 18-2for inputting the displaying signal. The output end of the controller18-1 for outputting the buzzer-activating control signal is connectedwith the input end of the buzzer 18-4 for inputting thebuzzer-activating control signal.

It may be set that when any of the temperature sensors 11 detects atemperature that is lower than the temperature suitable for inoculationand pouring solid medium, the buzzer 18-4 buzzes. There are Ntemperature sensors 11, where N is an integer greater than or equal toone. Each of the temperature sensors 11 is dedicated to measure oneexperimental tool placed on the multi-function cooling andthermo-sensitive rack.

Embodiment 38

Referring to FIG. 1, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 11. The chemical cooling pack is achemical ice pack.

Embodiment 39

Referring to FIG. 1, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 38. The chemical ice pack is made ofsodium sulfate decahydrate, ammonium hydrogen sulfate, sodium hydrogensulfate, and ammonium nitrate.

Embodiment 40

Referring to FIG. 1, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 12. The water-salt ice pack is madeof CaCl₂ and water, or of NH₄Cl and water, or of NH₄NO₃, Na₂CO₃ andwater.

Embodiment 41

Referring to FIG. 5, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 21. The chemical cooling pack is achemical ice pack.

Embodiment 42

Referring to FIG. 5, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 41. The chemical ice pack is made ofsodium sulfate decahydrate, ammonium hydrogen sulfate, sodium hydrogensulfate, and ammonium nitrate.

Embodiment 43

Referring to FIG. 5, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 22. The water-salt ice pack is madeof CaCl₂ and water, or of NH₄Cl and water, or of NH₄NO₃, Na₂CO₃ andwater.

Embodiment 44

Referring to FIG. 6, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 35. The chemical cooling pack is achemical ice pack.

Embodiment 45

Referring to FIG. 6, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 44. The chemical ice pack is made ofsodium sulfate decahydrate, ammonium hydrogen sulfate, sodium hydrogensulfate, and ammonium nitrate.

Embodiment 46

Referring to FIG. 6, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 36. The water-salt ice pack is madeof CaCl₂ and water, or of NH₄Cl and water, or of NH₄NO₃, Na₂CO₃ andwater.

Embodiment 47

Referring to FIGS. 7 and 8, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 37. The controller 18-1 is asingle-chip microcontroller.

Embodiment 48

Referring to FIGS. 3, 4, and 8, the present embodiment further delimitsthe multi-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 37. The connector 5 comprises areversible ratchet mechanism.

Embodiment 49

Referring to FIG. 8, the present embodiment further delimits themulti-function cooling and thermo-sensitive rack for microbiologyexperiment disclosed in Embodiment 37. The base 3 contains therein atemperature-lowering substance.

What is claimed is:
 1. A multi-function cooling and thermo-sensitiverack for microbiology experiment, characterized in that, themulti-function cooling and thermo-sensitive rack comprising a lateralframe and a base connected by angle adjustable connectors, wherein thelateral frame and the base are provided respectively with at least onehorizontal bar having a plurality of positioning dents and at least onepositioning hole, which are used to place and fix experiment devices inthe positioning dents and the positioning holes, wherein temperatures ofthe experiment devices are sensed and displayed by at least onetemperature sensor arranged at at least one temperature-measured site ofthe lateral frame and the base and at least one temperature-displayingprompter connected with the at least one temperature sensor; or by thethermochromic horizontal bar and base.
 2. The multi-function cooling andthermo-sensitive rack for microbiology experiment of claim 1, whereinthe positioning dents and the positioning hole are temperature-measuredsites, and wherein the temperature sensors are arranged at thepositioning dents or the positioning holes.
 3. The multi-functioncooling and thermo-sensitive rack for microbiology experiment of claim2, wherein the temperature-displaying prompter comprises: a controllerreceiving temperature-sensing signals from the temperature sensors andtransmitting temperature displaying signals and buzzer-activatingcontrol signals, a display receiving temperature displaying signals fromthe controller, a buzzer receiving buzzer-activating control signalsfrom the controller and buzzing according to the buzzer-activatingcontrol signals, and a power circuit powering the controller, thedisplay and the buzzer.
 4. The multi-function cooling andthermo-sensitive rack for microbiology experiment of claim 3, whereinthe power circuit has a power output end connected with a power inputend of the controller, a power input end of the display, and a powerinput end of the buzzer, respectively; wherein an input end of thecontroller for inputting at least one temperature-sensing signal isconnected with an output end of the at least one temperature sensor foroutputting the sensing signal; wherein an output end of the controllerfor outputting a displaying signal is connected with an input end of thedisplay for inputting the displaying signal; and wherein an output endof the controller for outputting a buzzer-activating control signal isconnected with an input end of the buzzer for inputting thebuzzer-activating control signal.
 5. The multi-function cooling andthermo-sensitive rack for microbiology experiment of claim 3, whereincontroller is a single-chip microcontroller.
 6. The multi-functioncooling and thermo-sensitive rack of claim 1, wherein the horizontalbars and the base include thermochromic material, and wherein thethermochromic material is thermochromic microencapsulated powder,thermochromic powder, thermochromic emulsion, thermochromic color masterbatch, or thermochromic ink.
 7. The multi-function cooling andthermo-sensitive rack for microbiology experiment of claim 1, whereinthe temperature sensors are infrared temperature sensors.
 8. Themulti-function cooling and thermo-sensitive rack for microbiologyexperiment of claim 1, wherein arms of U-shaped frame of the lateralframe are provided symmetrically with plural connecting holes forhorizontally fixing the horizontal bars.
 9. The multi-function coolingand thermo-sensitive rack for microbiology experiment of claim 1,wherein the lateral frame and the base are U-shaped frames of the samedimension.
 10. The multi-function cooling and thermo-sensitive rack formicrobiology experiment of claim 9, wherein the lateral frame and thebase are U-shaped frames of the same length.
 11. The multi-functioncooling and thermo-sensitive rack for microbiology experiment of claim1, wherein the positioning dents are semicircular positioning dents andevenly distributed over the horizontal bars.
 12. The multi-functioncooling and thermo-sensitive rack for microbiology experiment of claim1, wherein the connector comprises a reversible ratchet mechanism,wherein the connector has a through hole that has two coplanar circlecenters A, B, the internal teeth are formed symmetrically on the wall ofthe through hole, wherein a ratchet that has an outer wall peripherallyformed with a row of teeth is received in the through hole, the ratchetcan radially move to and fro toward either of the circle centers A andB, and wherein the teeth of the ratchet can engage with each of theinternal teeth, wherein a handle extends radially outward from outerperiphery of the through hole, the middle line of the handle is a centerline of the handle, the center line of the handle coincides with, isparallel to, or intersects the imaginary connecting line linking thecircle centers A and B, and wherein the ratchet is provided with anut-fitting hole, a square insert, or a mechanical workpiece, whereineach of the teeth of the ratchet has a curved top surface C and has atop width D equal to or greater than a root width E, each of theinternal teeth has a curved or flat top surface F and has a top width Tequal to or greater than a root width L, wherein two retaining ringsthat retain the ratchet in the through hole and two recesses forreceiving the retaining rings are formed at the outer periphery ofopposite ends of the ratchet, and wherein the retaining ring is a springloop cut at a radius thereof.
 13. The multi-function cooling andthermo-sensitive rack of claim 1, wherein the horizontal bars are heatresistant horizontal bars, the lateral frame is formed by heat resistantframe, the base contains therein a removable temperature-loweringsubstance, the temperature-lowering substance is a chemical cooling packor a physical cooling pack, wherein the chemical cooling pack is achemical ice pack that is made of sodium sulfate decahydrate, ammoniumhydrogen sulfate, sodium hydrogen sulfate, and ammonium nitrate; whereinthe physical cooling pack is a dry ice pack, a water ice pack, awater-salt ice pack, or a water-ethanol ice pack.
 14. A multi-functioncooling and thermo-sensitive rack for microbiology experiment,characterized in that the multi-function cooling and thermo-sensitiverack comprising horizontal bars having a plurality of semicircularpositioning dents, a base, connectors, a lateral frame, connectingholes, a temperature-displaying prompter, and N temperature sensors,where N is an integer greater than or equal to one, wherein the lateralframe is a U-shaped frame, the base has positioning holes, the lateralframe and the base are dimensionally identical to each other, thelateral frame and the base are connected through the connectors, andarms of the U-shaped frame of the lateral frame are providedsymmetrically with plural said connecting holes, the horizontal bars arehorizontally mounted over the connecting holes, and wherein the Ntemperature sensors are arranged at N temperature-measured sites,respectively, and the N temperature sensors have output ends foroutputting sensing signals connected with input ends of thetemperature-displaying prompter for inputting the N temperature-sensingsignals.
 15. The multi-function cooling and thermo-sensitive rack formicrobiology experiment of claim 14, wherein the temperature sensors areinfrared temperature sensors.
 16. The multi-function cooling andthermo-sensitive rack for microbiology experiment of claim 14, whereinthe temperature-displaying prompter comprises a controller, a display, apower circuit, and a buzzer, wherein the power circuit has a poweroutput end connected with a power input end of the controller, a powerinput end of the display, and a power input end of the buzzer,respectively, wherein input ends of the controller for inputting the Ntemperature-sensing signals are connected with output ends of the Ntemperature sensors for outputting the sensing signals, wherein anoutput end of the controller for outputting a displaying signal isconnected with an input end of the display for inputting the displayingsignals, and an output end of the controller for outputting abuzzer-activating control signal is connected with an input end of thebuzzer for inputting the buzzer-activating signal, wherein thecontroller is a single-chip microcontroller, the positioning dents areevenly distributed over the horizontal bars, the lateral frame is formedby heat resistant frame, the base is formed by heat resistant base, theconnector comprises a reversible ratchet mechanism, the base containstherein a temperature-lowering substance, the temperature-loweringsubstance is removable from the base, and wherein thetemperature-lowering substance is a cooling pack, the cooling pack is achemical cooling pack or a physical cooling pack, the physical coolingpack is a dry ice pack, a water ice pack, a water-salt ice pack, or awater-ethanol ice pack.
 17. A multi-function cooling andthermo-sensitive rack for microbiology experiment, characterized in thatthe multi-function cooling and thermo-sensitive rack comprisinghorizontal bars having a plurality of semicircular positioning dents, abase, connectors, and a lateral frame, wherein the lateral frame is aU-shaped frame, the base has positioning holes, wherein the lateralframe and the base are dimensionally identical to each other, whereinthe lateral frame and the base are connected through the connectors, thehorizontal bars are horizontally mounted on arms of the U-shaped frameof the lateral frame, and wherein the horizontal bars and the base arethermochromic.
 18. The multi-function cooling and thermo-sensitive rackfor microbiology experiment of claim 17, wherein the lateral frame andthe base are of the same length.
 19. The multi-function cooling andthermo-sensitive rack for microbiology experiment of claim 17, whereinthe horizontal bars and the base include thermochromic material, thethermochromic material is thermochromic microencapsulated powder,thermochromic powder, thermochromic emulsion, thermochromic color masterbatch, or thermochromic ink.
 20. The multi-function cooling andthermo-sensitive rack for microbiology experiment of claim 17, whereinthe positioning dents are evenly distributed over the horizontal bar,the lateral frame is formed by heat resistant frame, the base is formedby heat resistant base, the connector comprises a reversible ratchetmechanism, the base contains therein a temperature-lowering substance,the temperature-lowering substance is removable from the base, andwherein the temperature-lowering substance is a cooling pack, thecooling pack is a chemical cooling pack or a physical cooling pack, andthe physical cooling pack is a dry ice pack, a water ice pack, awater-salt ice pack, or a water-ethanol ice pack.